When Biel, 31, was last on the program, she told the host that her favorite part of married life with the 32-year-old pop star was being able to call him "my husband."

Justin's answer to the same question was downright "d'awww"-worthy.

"Every once in a while I can catch a glimpse of her when she doesn't see me looking, and I have this moment where I'm like ... 'If you only make bad decisions for the rest of your life, you made one really good decision,'" he said as the audience understandably swooned.